On 6/24/2025 1:56 PM, Jayesh Choudhary wrote:
> Add dt node for main_i2c4 instance along with required pinmuxing.
> Also add the gpio expander 'exp4' required by display connector.
>
> Signed-off-by: Jayesh Choudhary <j-choudhary@ti.com>
> ---
> .../dts/ti/k3-j721s2-common-proc-board.dts | 24 +++++++++++++++++++
> 1 file changed, 24 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/ti/k3-j721s2-common-proc-board.dts b/arch/arm64/boot/dts/ti/k3-j721s2-common-proc-board.dts
> index e2fc1288ed07..793d50344fad 100644
> --- a/arch/arm64/boot/dts/ti/k3-j721s2-common-proc-board.dts
> +++ b/arch/arm64/boot/dts/ti/k3-j721s2-common-proc-board.dts
> @@ -148,6 +148,13 @@ J721S2_IOPAD(0x060, PIN_INPUT_PULLUP, 13) /* (AC27) MCASP2_AXR1.I2C3_SDA */
> >;
> };
>
> + main_i2c4_pins_default: main-i2c4-default-pins {
> + pinctrl-single,pins = <
> + J721S2_IOPAD(0x014, PIN_INPUT_PULLUP, 8) /* (AD25) I2C4_SCL */
Please check once for i2c clock, pin should be in input or output pull
up mode.
> + J721S2_IOPAD(0x010, PIN_INPUT_PULLUP, 8) /* (AF28) I2C4_SDA */
> + >;
> + };
> +
> main_i2c5_pins_default: main-i2c5-default-pins {
> pinctrl-single,pins = <
> J721S2_IOPAD(0x01c, PIN_INPUT, 8) /* (Y24) MCAN15_TX.I2C5_SCL */
> @@ -370,6 +377,23 @@ exp2: gpio@22 {
> };
> };
>
> +&main_i2c4 {
> + status = "okay";
> + pinctrl-names = "default";
> + pinctrl-0 = <&main_i2c4_pins_default>;
> + clock-frequency = <400000>;
> +
> + exp4: gpio@20 {
> + compatible = "ti,tca6408";
> + reg = <0x20>;
> + gpio-controller;
> + #gpio-cells = <2>;
> + gpio-line-names = "DP0_PWR_SW_EN", "DP1_PWR_SW_EN", "UB981_PDB",
> + "UB981_GPIO0", "UB981_GPIO1", "UB981_GPIO2",
> + "UB981_GPIO3", "PWR_SW_CNTL_DSI0#";
> + };
> +};
> +
> &main_i2c5 {
> pinctrl-names = "default";
> pinctrl-0 = <&main_i2c5_pins_default>;